<template>
  <div class="workspace">
    <!-- 顶部按钮 -->
    <div class="action-bar">
      <el-button :key="action.cmd" v-for="action in acConf.left" v-bind="action.props" @click="actionRouter(action.cmd)">
        {{ action.text }}
      </el-button>
      <div style="flex: 1"></div>
      <el-button :key="action.cmd" v-for="action in acConf.right" v-bind="action.props" @click="actionRouter(action.cmd)">
        {{ action.text }}
      </el-button>
    </div>
    <!-- 主编辑区域 -->
    <div class="container">
      <!-- 左边组件库 -->
      <div class="left-board">
        <el-scrollbar :vertical="false" class="left-scrollbar">
          <el-collapse v-model="activeName" accordion class="components-list">
            <el-collapse-item v-for="(item, listIndex) in leftComponents" :key="listIndex" :name="item.title">
              <template slot="title">
                <div class="components-title"><svg-icon style="margin: 0 6px 0 0" icon-class="component" /> {{ item.title }}</div>
              </template>
              <draggable
                class="components-draggable"
                :list="item.list"
                :group="{ name: 'componentsGroup', pull: 'clone', put: false }"
                :clone="cloneComponent"
                draggable=".components-item"
                :sort="false"
                @end="onEnd"
              >
                <div v-for="(element, index) in item.list" :key="index" class="components-item" @click="addComponent(element)">
                  <div class="components-body"><svg-icon :icon-class="element.__config__.tagIcon" /> {{ element.__config__.label }}</div>
                </div>
              </draggable>
            </el-collapse-item>
          </el-collapse>
        </el-scrollbar>
      </div>
      <!-- 中间编辑区域 -->
      <div class="center-board">
        <el-scrollbar class="center-scrollbar">
          <el-row class="center-board-row" :gutter="formConf.gutter">
            <el-form
              :size="formConf.size"
              :label-position="formConf.labelPosition"
              :disabled="formConf.disabled"
              :label-width="formConf.labelWidth + 'px'"
            >
              <draggable class="drawing-board" :list="drawingList" :animation="340" group="componentsGroup">
                <draggable-item
                  v-for="(item, index) in drawingList"
                  :key="item.renderKey"
                  :drawing-list="drawingList"
                  :current-item="item"
                  :index="index"
                  :active-id="activeId"
                  :form-conf="formConf"
                  @activeItem="activeFormItem"
                  @copyItem="drawingItemCopy"
                  @deleteItem="drawingItemDelete"
                />
              </draggable>
              <div v-show="!drawingList.length" class="empty-info">拖入或点击选中需要添加的组件</div>
            </el-form>
          </el-row>
        </el-scrollbar>
      </div>
      <!-- 右侧属性编辑框 -->
      <right-panel
        :active-data="activeData"
        :form-conf="formConf"
        :show-field="!!drawingList.length"
        @tag-change="tagChange"
        @fetch-data="fetchData"
      />
      <!-- 剪贴板内容容器 -->
      <input id="copyNode" type="hidden" />
      <!-- 抽屉弹窗 -->
      <form-manage-drawer :visible.sync="formmanagedrawerVisible" size="80%" />
      <form-drawer :visible.sync="drawerVisible" :form-data="formData" size="80%" :generate-conf="generateConf" />
      <json-drawer size="60%" :visible.sync="jsonDrawerVisible" :json-str="JSON.stringify(formData)" @refresh="refreshJson" />
      <!-- 弹出确认窗 -->
      <code-type-dialog :visible.sync="dialogVisible" title="选择生成类型" :show-file-name="showFileName" @confirm="generate" />
    </div>
  </div>
</template>

<script>
import draggable from 'vuedraggable'
import { debounce } from 'throttle-debounce'
import { saveAs } from 'file-saver'
import ClipboardJS from 'clipboard'
import render from '@/components/xform/render/render'
import FormManageDrawer from './FormManageDrawer'
import FormDrawer from './FormDrawer'
import JsonDrawer from './JsonDrawer'
import RightPanel from './RightPanel'
import { inputComponents, selectComponents, layoutComponents, formConf } from '@/components/xform/generator/config'
import { exportDefault, beautifierConf, isNumberStr, titleCase, deepClone, isObjectObject } from '@/components/xform/utils/index'
import { makeUpHtml, vueTemplate, vueScript, cssStyle } from '@/components/xform/generator/html'
import { makeUpJs } from '@/components/xform/generator/js'
import { makeUpCss } from '@/components/xform/generator/css'
import drawingDefalut from '@/components/xform/generator/drawingDefalut'
import logo from '@/assets/logo.png'
import CodeTypeDialog from './CodeTypeDialog'
import DraggableItem from './DraggableItem'
import { getDrawingList, saveDrawingList, getIdGlobal, saveIdGlobal, getFormConf } from '@/components/xform/utils/db'
import loadBeautifier from '@/components/xform/utils/loadBeautifier'

let beautifier
const emptyActiveData = { style: {}, autosize: {} }
let oldActiveId
let tempActiveData
const drawingListInDB = getDrawingList()
const formConfInDB = getFormConf()
const idGlobal = getIdGlobal()

export default {
  components: {
    FormManageDrawer,
    draggable,
    // render,
    FormDrawer,
    JsonDrawer,
    RightPanel,
    CodeTypeDialog,
    DraggableItem,
  },
  data() {
    return {
      logo,
      // 顶部按钮组
      acConf: {
        left: [
          { text: '新增', cmd: 'newForm', props: { icon: 'el-icon-circle-plus-outline', type: 'primary', plain: true } },
          { text: '打开', cmd: 'showFormManage', props: { icon: 'el-icon-folder-opened', type: 'primary', plain: true } },
          { text: '保存', cmd: 'saveForm', props: { icon: 'el-icon-upload2', type: 'primary', plain: true } },
        ],
        right: [
          { text: '预览', cmd: 'preview', props: { icon: 'el-icon-view', type: 'primary', plain: true } },
          { text: 'JSON', cmd: 'showJson', props: { icon: 'el-icon-tickets', type: 'primary', plain: true } },
          { text: '导出', cmd: 'output', props: { icon: 'el-icon-download', type: 'primary', plain: true } },
          { text: '清空', cmd: 'empty', props: { icon: 'el-icon-delete', type: 'danger', plain: true } },
        ],
      },
      // 当前激活的组件
      activeName: '输入型组件',
      // 加入组件的流水ID
      idGlobal,
      // 表单构建数据
      formConf,

      // 组件库
      inputComponents,
      selectComponents,
      layoutComponents,
      leftComponents: [
        {
          title: '输入型组件',
          list: inputComponents,
        },
        {
          title: '选择型组件',
          list: selectComponents,
        },
        {
          title: '布局型组件',
          list: layoutComponents,
        },
      ],

      //
      drawingList: drawingDefalut,
      drawingData: {},
      activeId: drawingDefalut[0].formId,
      drawerVisible: false,
      formData: {},
      dialogVisible: false,
      jsonDrawerVisible: false,
      formmanagedrawerVisible: false,
      generateConf: null,
      showFileName: false,
      activeData: drawingDefalut[0],
      saveDrawingListDebounce: debounce(340, saveDrawingList),
      saveIdGlobalDebounce: debounce(340, saveIdGlobal),
    }
  },
  computed: {},
  watch: {
    // eslint-disable-next-line func-names
    'activeData.__config__.label': function (val, oldVal) {
      if (this.activeData.placeholder === undefined || !this.activeData.__config__.tag || oldActiveId !== this.activeId) {
        return
      }
      this.activeData.placeholder = this.activeData.placeholder.replace(oldVal, '') + val
    },
    activeId: {
      handler(val) {
        oldActiveId = val
      },
      immediate: true,
    },
    drawingList: {
      handler(val) {
        this.saveDrawingListDebounce(val)
        if (val.length === 0) this.idGlobal = 100
      },
      deep: true,
    },
    idGlobal: {
      handler(val) {
        this.saveIdGlobalDebounce(val)
      },
      immediate: true,
    },
  },
  created() {
    console.log('##表单设计器 on created')
  },
  mounted() {
    //  读取表单配置，无配置则加载默认
    // if (Array.isArray(drawingListInDB) && drawingListInDB.length > 0) {
    //   this.drawingList = drawingListInDB
    // } else {
    //   this.drawingList = drawingDefalut
    // }

    // // 激活第一个组件
    // this.activeFormItem(this.drawingList[0])
    // if (formConfInDB) {
    //   this.formConf = formConfInDB
    // }

    loadBeautifier((btf) => {
      beautifier = btf
    })

    // 初始化剪切板
    const clipboard = new ClipboardJS('#copyNode', {
      text: (trigger) => {
        const codeStr = this.generateCode()
        this.$notify({ title: '成功', message: '代码已复制到剪切板，可粘贴。', type: 'success' })
        return codeStr
      },
    })
    clipboard.on('error', (e) => {
      this.$message.error('代码复制失败')
    })
  },
  methods: {
    actionRouter(cmd) {
      this[`action_${cmd}`]()
    },

    action_preview() {
      this.AssembleFormData()
      this.drawerVisible = true
    },

    action_showJson() {
      this.AssembleFormData()
      this.jsonDrawerVisible = true
    },

    action_output() {
      this.dialogVisible = true
      this.showFileName = true
      this.operationType = 'download'
    },

    async action_empty() {
      try {
        await this.$confirm('确定要清空所有组件吗？', '提示', { type: 'warning' })
        this.drawingList = []
        this.idGlobal = 100
      } catch (e) {
        console.log('action_empty:', e)
      }
    },

    action_newForm() {
      console.log('新增表单')
    },
    action_saveForm() {
      console.log('保存表单')
    },
    setObjectValueReduce(obj, strKeys, data) {
      const arr = strKeys.split('.')
      arr.reduce((pre, item, i) => {
        if (arr.length === i + 1) {
          pre[item] = data
        } else if (!isObjectObject(pre[item])) {
          pre[item] = {}
        }
        return pre[item]
      }, obj)
    },
    setRespData(component, resp) {
      const { dataPath, renderKey, dataConsumer } = component.__config__
      if (!dataPath || !dataConsumer) return
      const respData = dataPath.split('.').reduce((pre, item) => pre[item], resp)

      // 将请求回来的数据，赋值到指定属性。
      // 以el-tabel为例，根据Element文档，应该将数据赋值给el-tabel的data属性，所以dataConsumer的值应为'data';
      // 此时赋值代码可写成 component[dataConsumer] = respData；
      // 但为支持更深层级的赋值（如：dataConsumer的值为'options.data'）,使用setObjectValueReduce
      this.setObjectValueReduce(component, dataConsumer, respData)
      const i = this.drawingList.findIndex((item) => item.__config__.renderKey === renderKey)
      if (i > -1) this.$set(this.drawingList, i, component)
    },
    fetchData(component) {
      const { dataType, method, url } = component.__config__
      if (dataType === 'dynamic' && method && url) {
        this.setLoading(component, true)
        this.$axios({
          method,
          url,
        }).then((resp) => {
          this.setLoading(component, false)
          this.setRespData(component, resp.data)
        })
      }
    },
    setLoading(component, val) {
      const { directives } = component
      if (Array.isArray(directives)) {
        const t = directives.find((d) => d.name === 'loading')
        if (t) t.value = val
      }
    },
    activeFormItem(currentItem) {
      this.activeData = currentItem
      this.activeId = currentItem.__config__.formId
    },
    onEnd(obj) {
      if (obj.from !== obj.to) {
        this.fetchData(tempActiveData)
        this.activeData = tempActiveData
        this.activeId = this.idGlobal
      }
    },
    addComponent(item) {
      const clone = this.cloneComponent(item)
      this.fetchData(clone)
      this.drawingList.push(clone)
      this.activeFormItem(clone)
    },
    cloneComponent(origin) {
      const clone = deepClone(origin)
      const config = clone.__config__
      config.span = this.formConf.span // 生成代码时，会根据span做精简判断
      this.createIdAndKey(clone)
      clone.placeholder !== undefined && (clone.placeholder += config.label)
      tempActiveData = clone
      return tempActiveData
    },
    createIdAndKey(item) {
      const config = item.__config__
      config.formId = ++this.idGlobal
      config.renderKey = `${config.formId}${+new Date()}` // 改变renderKey后可以实现强制更新组件
      if (config.layout === 'colFormItem') {
        item.__vModel__ = `field${this.idGlobal}`
      } else if (config.layout === 'rowFormItem') {
        config.componentName = `row${this.idGlobal}`
        !Array.isArray(config.children) && (config.children = [])
        delete config.label // rowFormItem无需配置label属性
      }
      if (Array.isArray(config.children)) {
        config.children = config.children.map((childItem) => this.createIdAndKey(childItem))
      }
      return item
    },
    AssembleFormData() {
      this.formData = {
        fields: deepClone(this.drawingList),
        ...this.formConf,
      }
      console.log('AssembleFormData:', this.formData)
    },
    generate(data) {
      const func = this[`exec${titleCase(this.operationType)}`]
      this.generateConf = data
      func && func(data)
    },

    action11(data) {
      const codeStr = this.generateCode()
      const blob = new Blob([codeStr], { type: 'text/plain;charset=utf-8' })
      saveAs(blob, data.fileName)
    },
    execCopy(data) {
      document.getElementById('copyNode').click()
    },

    drawingItemCopy(item, list) {
      let clone = deepClone(item)
      clone = this.createIdAndKey(clone)
      list.push(clone)
      this.activeFormItem(clone)
    },
    drawingItemDelete(index, list) {
      list.splice(index, 1)
      this.$nextTick(() => {
        const len = this.drawingList.length
        if (len) {
          this.activeFormItem(this.drawingList[len - 1])
        }
      })
    },
    generateCode() {
      const { type } = this.generateConf
      this.AssembleFormData()
      const script = vueScript(makeUpJs(this.formData, type))
      const html = vueTemplate(makeUpHtml(this.formData, type))
      const css = cssStyle(makeUpCss(this.formData))
      return beautifier.html(html + script + css, beautifierConf.html)
    },

    showFormManage() {
      this.formmanagedrawerVisible = true
    },

    run() {
      this.dialogVisible = true
      this.showFileName = false
      // this.operationType = 'run'
    },
    copy() {
      this.dialogVisible = true
      this.showFileName = false
      this.operationType = 'copy'
    },
    tagChange(newTag) {
      newTag = this.cloneComponent(newTag)
      const config = newTag.__config__
      newTag.__vModel__ = this.activeData.__vModel__
      config.formId = this.activeId
      config.span = this.activeData.__config__.span
      this.activeData.__config__.tag = config.tag
      this.activeData.__config__.tagIcon = config.tagIcon
      this.activeData.__config__.document = config.document
      if (typeof this.activeData.__config__.defaultValue === typeof config.defaultValue) {
        config.defaultValue = this.activeData.__config__.defaultValue
      }
      Object.keys(newTag).forEach((key) => {
        if (this.activeData[key] !== undefined) {
          newTag[key] = this.activeData[key]
        }
      })
      this.activeData = newTag
      this.updateDrawingList(newTag, this.drawingList)
    },
    updateDrawingList(newTag, list) {
      const index = list.findIndex((item) => item.__config__.formId === this.activeId)
      if (index > -1) {
        list.splice(index, 1, newTag)
      } else {
        list.forEach((item) => {
          if (Array.isArray(item.__config__.children)) this.updateDrawingList(newTag, item.__config__.children)
        })
      }
    },
    refreshJson(data) {
      this.drawingList = deepClone(data.fields)
      delete data.fields
      this.formConf = data
    },
  },
}
</script>

<style lang="scss">
@import '@/components/xform/styles/home';
</style>

<style lang="scss" scoped>
::v-deep .el-scrollbar__wrap {
  overflow-x: hidden;
}
::v-deep .el-collapse {
  border: none;
}
</style>
